KEV11-A floating point

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The KEV11-A is an optional chip for LSI-11 CPU which adds support for the PDP-11 Extended Instruction Set and also FIS floating point.

One version is a 3015 23-003B5 (seen with the first set of LSI-11 chips), which is suitable for the M7274 quad card etch revisions E and F, and the M7260 dual card. Another version is the 23-091A5, suitable for the M7274 etch revisions C and D (although it has also been seen on etch revision F cards).